The headlight level sensor is an essential part of your vehicle’s lighting system and is used to tell the vehicle where to position the headlights whilst the vehicle is moving. The headlight level sensor is crucial to road safety as it ensures that the positioning of the lighting is not at a level that will blind oncoming motorists.

There are two headlight level sensors on a vehicle. One is generally positioned in the front driverside wheel arch and the other in the rear driverside wheel arch. The headlight level sensors are connected to the vehicle power supply using a male/female connector.

Corrosion can arise with the headlight level sensors due to where they are situated on the vehicle, and are prone to water damage. The front headlight level sensor is more susceptible than the rear.

Signs that your headlight level sensor is damaged can be indicated by a warning light or error message on your dashboard, the headlight beam on one side of your vehicle being at a different height to the other or visible signs of corrosion on the headlight level sensor itself.